Method for forming off-set dimples in metal sheets

ABSTRACT

A metal processing apparatus comprising: (i) a first tool portion including a first carrier, a cutting surface, a first plurality of dimple forming elements; (ii) a second tool portion including a second carrier, in opposing relation to the first tool portion, the second tool portion having a blade or adapted to receive the blade which is adapted to contact the cutting surface for cutting an edge of a metal sheet to form a cut edge in the metal sheet, a second plurality of dimple forming elements; and (iii) a dimpler indexer to index the first plurality of dimple forming from a first pre-determined location to a second pre-determined location. The metal processing apparatus may find particular use in creating dimples along one or more cut edges of a metal sheet to allow for stacking of the metal sheets with an airgap therebetween.

FIELD

The present disclosure relates to a metal processing apparatus andmethod for forming dimples in metal sheets. The present disclosure mayspecifically relate to forming dimples in sheet metal along a cut edgeto improve handling after the sheet metal is stacked with other sheetmetal.

BACKGROUND

Generally, after a metal sheet has been cut from a metal coil to form ablank for a metal sheet, or cut from a blank to form a metal sheet, themetal sheet is stacked on top of one or more metal sheets for storage,shipping, and handling. When the metal sheets are stacked with oneanother, there is often minimal, if any, distance between the sheets(i.e., no gap). This lack of distance between the metal sheets resultsin difficulty in separating the sheets from one another. For example,robotic handling grips cannot insert any part of an end effector inbetween the sheets to then lift a sheet off of the stack. U.S. Pat. No.3,440,988 describes the problems encountered in stacking flat metalsheets and forming non-structural deformations (i.e. dimples) to helpprevent the metal sheets from stacking tightly.

EP0688614 discloses a method and apparatus for stamping a dimple into asheet-metal blank to enable uniform stacking of the metal blanks. U.S.Pat. No. 5,673,585 discloses a punching or stamping apparatus forforming dimples in sheet metal such that no two dimples formed insubsequent blanks align when the blanks are stacked. Notwithstanding theabove, there appears an absence of teaching to form dimples adjoining acut edge and multiple sheets with staggered dimples along cut edges.

What is needed is a method for stacking metal sheets which allows thesheets to be easily removed from the stack. What is also needed is anapparatus which can create features in the metal sheets which allow fora gap to be formed in between the sheets when placed in a stack. What isneeded is an apparatus which can off-set features, such as dimples, soas to avoid the features nesting with another to maintain the gapbetween the sheets when placed in a stack. What is needed is anapparatus which can create a plurality of dimples metal sheets inincrementally off-set locations to prevent nesting of the metal sheets.

SUMMARY

The present disclosure relates to a metal processing apparatuscomprising: (i) a first tool portion including a first carrier, thefirst tool portion having: (a) a forward portion and a rearward portion;(b) a cutting surface which is adapted to be contacted with a blade andwherein the forward portion and the rearward portion are an opposingsides of the cutting surface; (c) a first plurality of dimple formingelements located on the forward portion, the rearward portion, or both;(ii) a second tool portion including a second carrier, wherein thesecond tool portion is adapted to be located in opposing relation to thefirst tool portion, the second tool portion having: (a) a forwardportion and a rearward portion; (b) a blade or configured to receive ablade adapted to contact the cutting surface for cutting an edge of ametal sheet to form a cut edge in the metal sheet, wherein the forwardportion and the rearward portion on opposing sides of the blade; (c) asecond plurality of dimple forming elements located on the forwardportion, rearward portion, or both and aligned with the first pluralityof dimple forming elements; and (iii) a dimpler indexer to index thefirst plurality of dimple forming elements from a first pre-determinedlocation to a second pre-determined location.

A method for dimpling a cut edge portion of a metal sheet comprising:(i) feeding a first metal sheet in a feeding direction; (ii) cutting aforward portion of the first metal sheet to define a front cut edge inthe first metal sheet; (iii) forming a first plurality of dimpleslocated in a first pre-determined location substantially along the frontcut edge of the first metal sheet; (iv) advancing the first metal sheetin the feeding direction; (v) cutting a rearward portion of the firstmetal sheet to define a rear cut edge in the first metal sheet anddefine a perimeter of the first metal sheet; (vi) forming a secondplurality of dimples in a second pre-determined location substantiallyalong the rear cut edge of the first metal sheet; (vii) feeding a secondmetal sheet in the feeding direction; (viii) cutting a forward portionof the second metal sheet to define a front cut edge in the second metalsheet; (ix) forming a first plurality of dimples located in a thirdpre-determined location substantially along the front cut edge of thesecond metal sheet; (x) advancing the second metal sheet in the feedingdirection; (xi) cutting a rearward portion of the second metal sheet todefine a rear cut edge in the second metal sheet and define a perimeterof the second metal sheet; (xii) forming a second plurality of dimplesin a fourth pre-determined location substantially along the rear cutedge of the second metal sheet; (xiii) forming a stack of metal sheetsincluding the first metal sheet and the second metal sheet, wherein anair gap is located between the first metal sheet and the second metalsheet substantially about the perimeter of the first metal sheet and thesecond metal sheet, wherein the air gap is greater than about 0.1 mm;and wherein the first pre-determined location is off-set relative to thethird pre-determined location and wherein the second pre-determinedlocation is off-set relative to the fourth pre-determined location.

The present disclosure may provide a metal processing apparatus and amethod for forming a plurality of dimples in one or more metal sheets.The plurality of dimples in the one or more metal sheets may allow foran air gap between the one or more metal sheets when stacked with oneanother. The air gap between the metal sheets may allow for the sheetsto be easily separated, such as with a tool or by hand.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 illustrates a metal processing apparatus in an open positionaccording to the teachings.

FIG. 2 illustrates a metal processing apparatus in a closed positionaccording to the teachings.

FIG. 3 illustrates a first tool portion of a metal processing apparatusaccording to the teachings.

FIG. 4 illustrates a second tool portion of a metal processing apparatusaccording to the teachings.

FIG. 5 illustrates a first plurality of dimple forming elements locatedin a first tool portion according to the teachings.

FIG. 6 illustrates a second plurality of dimple forming elements locatedin a second tool portion according to the teachings.

FIG. 7 illustrates the first plurality of dimple forming elements ofFIG. 5 according to the teachings.

FIG. 8 illustrates the second plurality of dimple forming elements ofFIG. 6 according to the teachings.

FIG. 9 illustrates the dimpler indexer of a metal processing apparatusaccording to the teachings.

FIG. 10 illustrates a first position of the metal processing apparatusaccording to the teachings.

FIG. 11 illustrates a second position of the metal processing apparatusaccording to the teachings.

FIG. 12 shows a metal processing apparatus receiving a metal sheetaccording to the teachings.

FIG. 13 shows a metal processing apparatus finalizing processing of ametal sheet according to the teachings.

FIG. 14a illustrates an exploded view of a stack of metal according tothe teachings.

FIG. 14b illustrates a close-up view of the stack of metal of FIG. 14aaccording to the teachings herein.

DETAILED DESCRIPTION

The explanations and illustrations presented herein are intended toacquaint others skilled in the art with the present teachings, itsprinciples, and its practical application. The specific embodiments ofthe present teachings as set forth are not intended as being exhaustiveor limiting of the present teachings. The scope of the present teachingsshould be determined with reference to the appended claims, along withthe full scope of equivalents to which such claims are entitled. Thedisclosures of all articles and references, including patentapplications and publications, are incorporated by reference for allpurposes. Other combinations are also possible as will be gleaned fromthe following claims, which are also hereby incorporated by referenceinto this written description.

The disclosure relates to a metal processing apparatus which may be anapparatus for forming one or more pluralities of dimples in sheet metal.The metal processing apparatus may find particular use as a die forcutting and/or shaping metal sheets. The metal processing apparatus mayinclude: a first tool portion including a first carrier, the first toolportion having: a forward portion and a rearward portion; a cuttingsurface which is adapted to be contacted with a blade and wherein theforward portion and the rearward portion are an opposing sides of thecutting surface; and a first plurality of dimple forming elementslocated on the forward portion, the rearward portion, or both. The metalprocessing apparatus may include: a second tool portion including asecond carrier, wherein the second tool portion is adapted to be locatedin opposing relation to the first tool portion and may be reciprocallymoveable relative to the first tool portion, the second tool portionhaving: a forward portion and a rearward portion; a blade or configuredto receive a blade adapted to contact the cutting surface for cutting anedge of a metal sheet to form a cut edge in the metal sheet, wherein theforward portion and the rearward portion on opposing sides of the blade;a second plurality of dimple forming elements located on the forwardportion, rearward portion, or both and aligned with the first pluralityof dimple forming elements. The metal processing apparatus may include adimpler indexer to index a plurality of dimple forming elements from afirst pre-determined location to a second pre-determined location. Themetal processing apparatus may specifically be adapted for providing oneor more pluralities of dimples in sheet metal, such as substantiallyalong at least a portion of the perimeter. The metal processingapparatus may specifically be adapted for off-setting a firstpre-determined location of a plurality of dimples in one metal sheetfrom a second pre-determined location of a plurality of dimples in asecond metal sheet. By off-setting the plurality of dimples between thefirst and second metal sheets, when the metal sheets are stacked, thefirst and second metal sheets are restricted from nesting (that is, thedimples do not coincide with each other and a female dimple portion doesnot receive a male dimple portion). By restricting nesting, an air gapis left between the metal sheets to allow material handling access tounstack the metal sheets may rest in dimples of adjoining sheets. It ispossible some dimples of a sheet may nest in dimples of adjoining sheetsin the metal stack.

The metal processing apparatus includes one or more tool portions, suchas a first tool portion and a second tool portion. The one or more toolportions may provide support for one or more carriers, provide a cuttingsurface, provide support for or be capable of receiving a blade, providea conveyance surface, mate with other tool portions, or any combinationthereof. The one or more tool portions may serve as one or more dieblocks. As die blocks, the one or more tool portions may provide supportfor most or all of the components of the metal processing apparatus. Forexample, the first tool portion may be a lower die and the second toolportion may be an upper die. For example, the first tool portion andsecond tool portion may be opposing each other side-by-side. The firsttool portion and/or second tool portion may be sub-portions. The firsttool portion may include one portion, two portions, or more. The secondtool portion may include one portion, two portions, or more. The one ormore tool portions may include one or more mating features which mate orjoin tool portions together. The mating features may include one or morebushings, one or more alignment pins, one or more legs, one or morepegs, one or more holes, one or more fasteners, one or more joints, thelike, or any combination thereof. For example, a first tool portion mayinclude one or more bushings which receive one or more alignment pins ofa second tool portion. When the one or more tool portions are mated, thetool portions may form a lower portion (i.e., lower die) and an upperportion (i.e., upper die) of the metal processing apparatus. Forexample, a first tool portion may be a lower portion and a second toolportion may be an upper portion. When mated, the metal apparatus mayinclude a longitudinal axis, which may extend from end to end, may runsubstantially perpendicular to a feeding direction, may be substantiallyparallel to a support surface upon which the apparatus rests (i.e.,floor/ground surface, fixture table, etc), may be parallel to linearand/or incremental movement of one or more carriers, or any combinationthereof. One or more of the tool portions may move toward another of thetool portions to apply a die force, a cutting force, or both. Forexample, the second tool portion may move toward the first tool portion.Alternatively, the tool portions may remain fixed while components, suchas one or more carriers, may move toward one another. Each of the one ormore tool portions may have a forward portion and a rearward portion.The forward portion may be located at the outgoing end of the metalprocessing apparatus and the rearward portion may be located at theincoming end of the metal processing apparatus. The one or more toolportions may include one or more carriers.

The one or more tool portions may include one or more carriers. The oneor more carriers may function to provide off-set dimpling locations,support a plurality of dimpling elements, provide a cutting surface,and/or provide or receive a blade. The one or more carriers may serve asdie blocks and/or punch plates, such as by providing support to one ormore components of the metal processing apparatus, by including one ormore features which produce a punch (i.e., dimples), or both. The one ormore carriers may include a first carrier and a second carrier. A firstcarrier may be located in a first tool portion and a second carrier maybe located in a second tool portion. The one or more carriers may belocated between the forward portion and rearward portion of the one ormore tool portions. The one or more carriers may be located internallyin the one or more tool portions. The one or more tool portions mayinclude one or more housings. The one or more carriers may be locatedinternally of one or more housings. A first carrier may be locatedbetween the incoming end and the outgoing end of the first tool portion.A second carrier may be adapted to be in an opposing relationship withthe first carrier, such as when the first tool portion is mated with thesecond tool portion. The one or more carriers may include contactsurfaces suitable for coming into contact with sheet metal (e.g., sheetmetal intended to provide a class A surface) such as by not damaging thesheet metal (i.e., scratching, gauging, denting, etc). The contactsurfaces may be generally smooth and untextured surfaces includingportions that are polymeric (e.g., a relatively hard polymer such as apolyamide), metal, ceramic, the like, or a combination thereof. The oneor more carriers may be moveable, fixed, or a combination thereof. Forexample, a first carrier may be moveable while the second carrier may befixed. The one or more carriers may be moveable in one or more axes,fixed in one or more axes, or both (e.g., in a z-axis, x-axis, and/ory-axis). For example, the first carrier may be moveable substantiallyparallel to the longitudinal axis of the apparatus, substantiallyparallel to a vertical axis substantially perpendicular to thelongitudinal axis or both. For example, the second carrier may bemoveable in a vertical axis but may remain fixed relative to thelongitudinal axis. The one or more carriers may be moveable by anindexer. For example, the first carrier may be linearly moved by anindexer. The first carrier may be moved (i.e. driven) by the indexer inincremental distances. The incremental distances may be equal to otherincremental distances, may differ from other incremental distances, or acombination of both. The first carrier may be able to be moved to andlocated in a plurality of pre-determined locations. Each pre-determinedlocation may be off-set from another pre-determined location. Forexample, the indexer may laterally move the first carrier within thefirst tool portion from a first pre-determined location to one or moresubsequent pre-determined locations. The one or more carriers mayinclude a plurality of dimpling forming elements.

The one or more tool portions may include one or more pluralities ofdimple forming elements. The dimple forming elements may form dimples(i.e., indentations, depressions, impressions, projections, etc) insheet metal. The pluralities of dimple forming elements may be locatedon the first carrier portion, the second carrier portion, or both. Thedimple forming elements may include a first plurality of dimple formingelements, a second plurality of dimple forming elements, or both. Afirst plurality of dimple forming elements may be located on the firstcarrier. The first plurality of dimple forming elements may be locatedon opposing sides of the cutting surface, such as on the forward portionof the first carrier and the rearward portion of the first carrier. Asecond plurality of dimple forming elements may be located on the secondcarrier. The second plurality of dimple forming elements may be locatedon opposing sides of a blade or blade receiving area of the secondcarrier, such as on the forward portion of the second carrier and therearward portion of the second carrier. The dimple forming elements mayinclude one or more male portions, one or more female portions, or both.The first plurality of dimple forming elements may be aligned andcooperate with the second plurality of dimple forming elements to form aplurality of dimples. For example, one or more male portions (such as ina first carrier) are received within one or more female portions (suchas in a second carrier) to form a plurality of dimples or vice-versa. Asanother example, one or more male portions (such as in a first carrier)may cooperate with one or more male portions (such as in a secondcarrier) to form a plurality of dimples, such as by being off-set fromone another. The dimple forming elements may include one or more wells,one or more dimplers, one or more bores, or any combination thereof. Forexample, the one or more male portions may include the one or moredimplers, the one or more bores, or both. The one or more male portionsof the dimple forming elements may correspond to forming one or morefemale portions (e.g., indented, concave, or the like) of the pluralityof dimples. The one or more female portions may include the one or morewells. The one or more female portions of the dimple forming elementsmay correspond to forming one or more male portions (e.g., a protrusion,convex, or the like) of the plurality of dimples. The plurality ofdimple forming elements may be made of any material which can receiveand sustain a force (i.e., die or punch force) without being damaged andwithout imparting damage (i.e., cracks, holes, scratches, etc.) to thesheet metal. The plurality of dimple forming elements may be made ofmetal, such as steel.

The dimple forming elements may include a plurality of bores, aplurality of dimplers, or both. The plurality of bores, plurality ofdimplers, or both may be located in a carrier, such as the firstcarrier. The plurality of bores may include a plurality of dimplersdisposed within. One or more of the dimplers may include a base. One ormore bores may have a diameter about equal to or larger than a diameterof a portion of one or more dimplers. For example, the base of one ormore dimplers may have a diameter smaller than or about equal to thediameter of one or more bores. The diameter of the base may allow theone or more dimplers to be disposed within the one or more bores. Thebase may be generally circular, elliptical, square, triangular,rectangular, polygonal, or any shape suitable for residing within thebore. The base may have a height about equal to or less than a height ofthe one or more bores, so that the base does not protrude above an uppersurface of the first carrier. The plurality of dimplers may include oneor more protrusions. The protrusions may extend from the base. Theprotrusions may extend beyond the upper surface of the first carrier.The one or more protrusions may include one or more generally uprightposts. The one or more protrusions may have generally tapered ends. Thetapered ends may be substantially flat, pointed, rounded, the like, orany combination thereof. The tapered ends may be sufficiently dull, havea surface area, and/or radius such that upon contact with sheet metal toform the plurality of dimples, the tapered ends do not protrude throughthe sheet metal resulting in a hole, crack, or other deformity inaddition to the plurality of dimples. The one or more protrusions mayhave a generally cone-like shape. The one or more protrusions maygenerally taper from the base. The plurality of dimple forming elementsmay be spaced apart from each other (i.e., other dimple formingelements) by about 10 mm or more, about 50 mm or more, about 75 mm ormore, or even about 90 mm or more. The plurality of dimple formingelements may be spaced apart from each other (i.e., other dimple formingelements) by about 300 mm or less, about 250 mm or less, about 200 mm orless, or even about 150 mm or less. A plurality of dimple formingelements may be located along a forward portion of the first toolportion, the first carrier, or both. A plurality of dimple formingelements may be located along a rearward portion of the first toolportion, the first carrier, or both. The distance between adjacentdimple forming elements in the forward portion, rearward portion, orboth may be greater than the distance between dimple forming elementslocated across from each other. For example, the distance between twoadjacent dimple forming elements in the forward portion and/or twoadjacent dimple forming elements in the rearward portion may be greaterthan the distance between a dimple forming element in the forwardportion located across from a dimple forming portion in the rearwardportion. The plurality of dimplers may cooperate with a plurality ofwells to form a plurality of dimples.

The plurality of dimple forming elements may include a plurality ofwells. The wells may be located in a carrier, such as the secondcarrier. The plurality of wells may be aligned with the plurality ofdimplers. The plurality of wells may be slot shaped, have a longerlength than a width of a dimpler, or both. The plurality of wells may belong enough to accommodate lateral movement of the plurality ofdimplers, such as lateral movement resulting from movement of the firstcarrier. The plurality of wells may be shaped so that the wells remainstationary while accommodating lateral movement of the plurality ofdimplers. For example, one well may accommodate multiple positions of adimpler as the dimpler moves laterally. The lateral movement may resultfrom indexing (i.e., incremental movement), such as indexing by adimpler indexer. The plurality of wells may have a depth to receive theplurality of dimplers with sheet metal therebetween. The plurality ofwells may be spaced apart from each other (i.e., other wells) by about10 mm or more, about 50 mm or more, about 75 mm or more, or even about90 mm or more. The plurality of wells may be spaced apart from eachother (i.e., other wells) by about 300 mm or less, about 250 mm or less,about 200 mm or less, or even about 150 mm or less. A plurality of wellsmay be located along a forward portion of the second tool portion, thesecond carrier, or both. A plurality of wells may be located along arearward portion of the second tool portion, the second carrier, orboth. The distance between adjacent wells in the forward portion,rearward portion, or both may be greater than the distance between wellslocated across from each other. For example, the distance between twoadjacent wells in the forward portion and/or two adjacent wells in therearward portion may be greater than the distance between a well in theforward portion located across from a well in the rearward portion.

The plurality of dimple forming elements may form a plurality of dimplesin sheet metal along a cut edge of the sheet metal. One or more of thedimples may include both a female portion and a male portion. The femaleportion of the dimple may be the concave surface (e.g., inwardly formed)of the dimple. The male portion of the dimple may be the convex surface(e.g. outwardly formed) of the dimple. The plurality of dimples mayinclude about 1, 3, 5, 7, 10, or even more dimples formed along a cutedge of the sheet metal. The plurality of dimples may include about 100,98, 95, 93, or even less dimples formed along a cut edge of the sheetmetal. The plurality of dimples may include even more than about 100dimples along a cut edge of the sheet metal. The plurality of dimplesmay be located within about the middle 30%, about the middle 40% or evenabout the middle 50% of the cut edge. The plurality of dimples may belocated within about the outer 10%, about the outer 20%, or even aboutthe outer 30% of the cut edge. The plurality of dimple forming elementsmay form dimples in sheet metal which are spaced apart. The plurality ofdimples may be evenly spaced and/or randomly spaced along the cut edge.The plurality of dimples along a cut edge may be spaced apart from eachother (i.e., other dimples) by about 10 mm or more, about 50 mm or more,about 75 mm or more, or even about 90 mm or more. The plurality ofdimples along a cut edge may be spaced apart from each other (i.e.,other dimples) by about 300 mm or less, about 250 mm or less, about 200mm or less, or even about 150 mm or less. The plurality of dimpleforming elements may form dimples in sheet metal having a width ordiameter from about 0.1 mm to about 30 mm. The plurality of dimpleforming elements may form dimples in sheet metal having a depth fromabout 0.1 mm to about 50 mm. The plurality of dimple forming elementsmay form dimples in a plurality of pre-determined locations. Forinstance, the plurality of dimple forming elements may be movedlinearly. For example, the plurality of dimple forming elements mayapply a die or punch force to sheet metal to form a plurality ofdimples. To apply the die or punch force, the first plurality of dimpleforming elements may be affixed to the first carrier. The first carriermay be located in a first pre-determined location when applying theinitial die or punch force. After applying an initial die or punchforce, the first carrier may be linearly moved to a subsequentpre-determined location. The subsequent pre-determined location may belinearly off-set from the first pre-determined location. To off-set thepre-determined locations, the first carrier may be moved to thesubsequent pre-determined location. By moving the first carrier to asubsequent pre-determined location, a subsequent die or punch force mayresult in a second plurality of dimples. The second plurality of dimplesmay be off-set from the first plurality of dimples. To move the firstcarrier, the plurality of dimple forming elements, or both to and frompre-determined locations, an indexer may be part of the apparatus.

The metal processing apparatus desirably includes an indexer. Theindexer may function to translate (e.g., move axially, linearly,incrementally) one or more carriers, one or more pluralities of dimpleforming elements, or both. The indexer may include an actuator, dimplesupport member, or both.

The indexer may include an actuator for driving the one or morecarriers, the one or more pluralities of dimple forming elements, orboth. The actuator may be hydraulic, pneumatic, electric, thermal,magnetic, mechanical, the like, or any combination thereof. The actuatormay be connected to an energy source. For example, the actuator may beconnected to a source of compressed air. The actuator may deliver airpressure from the compressed air source. The actuator may include one ormore distribution lines. The one or more distribution lines may be airdistribution lines. The one or more distribution lines may transferenergy from the energy source to the indexer. For instance, the one ormore air distribution lines may transfer compressed air from acompressed air source to the actuator. The air distribution lines mayinclude an incoming airline. The incoming airline may transfer energyfrom the energy source to a manifold. The air distribution lines mayinclude one or more outgoing air lines connected to the manifold. Forexample, the actuator may include two outgoing air lines connected to amanifold. The one or more outgoing airlines may provide for a singledirection or two directions of linear movement. The outgoing airlinesmay provide for generally opposing linear directions of movement. Forexample, a first outgoing airline delivering energy to the first carriermay result in the first carrier traveling in a first direction along thefirst tool portion. For example, a second outgoing airline deliveryenergy to the first carrier may result in the first carrier traveling ina second direction, opposite the first direction, along the first toolportion. The actuator may include a manifold. The manifold may controlhow energy is directed to the one or more air flow lines. By controllinghow energy is directed to the one or more air flow lines, the manifoldmay control the direction of movement of a carrier, such as the firstcarrier. The manifold may include one or more valves to direct energy(e.g., air flow) to one more air flow lines. The actuator may include anair cylinder. The air cylinder may be a linear air cylinder. The aircylinder may be single-acting or double acting. The air cylinder may beconnected to one or more air flow lines, such as the outgoing air flowlines. The air cylinder may be in communication with one or morecarriers, one or more pluralities of dimple forming members, and/or oneor more dimple support members.

The indexer may include a dimple support member. The dimple supportmember may be affixed to or in communication one or more tool portions,one or more carriers, one or more pluralities of dimple forming members,the actuator, and/or an air cylinder. The dimple support member may beaffixed to both the actuator and a carrier, such as the first carrier.By being connected to the actuator and carrier, the dimple supportmember may be able to transfer energy from the energy source to thefirst carrier. By transferring energy (e.g., by releasing compressed airfor acting against the air cylinder) from the energy source to the firstcarrier, the first carrier is able to be moved linearly. The dimpleindexer may be able to move the first carrier along one or more axes(e.g., x-axis, y-axis, and/or z-axis) in one or more planes. Forexample, the dimple indexer may move the first carrier along an axissubstantially parallel to the longitudinal axis of the metal processingapparatus, substantially perpendicular to the longitudinal axis of themetal processing apparatus while in the substantially the same plane,and/or substantially perpendicular to the longitudinal axis of the metalprocessing apparatus while in different plane (i.e., a planesubstantially perpendicular). The dimpler indexer, the dimple supportmember, or both may move the first carrier linearly in one or moredirections. For example, the dimpler indexer, dimple support member, orboth may move the first carrier in one direction (i.e., transverse) fromone pre-determined position to another pre-determined position. Forexample, the dimpler indexer, dimple support member, or both may movethe first carrier in at least two directions, such as transverse,retracting (i.e., moving downward away from second carrier), andextending (i.e., moving upward toward the second carrier). The dimplerindexer, dimple support member, or both may move the first plurality ofdimple forming elements while the first carrier remains stationary. Forexample, the first plurality of dimple forming elements may retract fromone or more bores of the first carrier and extend through off-set boresof the first carrier. The dimple support member may linearly move (i.e.,incrementally advance) the first carrier. By moving the first carrier,the dimple support member may move the first plurality of dimple formingelements to one or more subsequent pre-determined locations. Thepre-determined locations may be off-set from one another. The dimplesupport member may incrementally advance the first carrier such that thefirst plurality of dimple forming elements move linearly by about 0.1 mmto about 500 mm, by about 25 mm to about 300 mm, or even from about 50mm to about 150 mm from one pre-determined location to a subsequentpre-determined location.

A tool portion, such as a first tool portion, may include a cuttingsurface. The cutting surface may be adapted to be contacted by a bladeor other cutting member. The cutting surface may be included in thefirst carrier. The cutting surface may be below an upper surface of thefirst carrier (i.e., indented, groove, channel, etc). The cuttingsurface may have a width, such as a channel or groove width. The widthmay be larger than a width of a blade, such that the cutting surface mayreceive the blade. The cutting surface may include a sharpened edge(i.e., a shearing edge). The cutting surface may cooperate with theblade to cut a metal sheet (i.e., a sharpened blade edge may bypass asharpened edge of the cutting surface to cut the metal). The cuttingsurface may be located along a cut axis of the first tool portion, thefirst carrier, or both. The cutting surface may be about parallel to thelongitudinal axis of the metal processing apparatus, may be at any angleto the feeding direction, or both. The cutting surface may define theforward portion and the rearward portion in the first tool portion, thefirst carrier, or both. The side of the first tool portion, the firstcarrier, or both located on a side of the cutting surface nearest theoutgoing end may be defined as the forward portion. The side of thefirst tool portion, the first carrier, or both located on a side of thecutting surface nearest the incoming end may be defined as the rearwardportion.

One or more tool portions, such as the second tool portion, may beconfigured to receive a blade or may include a blade. The blade mayapply a cutting force, cut a front edge, a rear edge, or both of sheetmetal. The blade may be located or received between a forward portionand a rearward portion, such as between the forward portion and rearwardportion of the second tool portion. The blade may be integral with theforward portion and/or rearward portion of the second tool portion. Theblade may be moveable or fixed relative to a tool portion and/or acarrier. For example, the blade may linearly move relative to the secondtool portion or second carrier to apply the cutting force, or the blademay remain fixed with the second tool portion or second carrier, suchthat second tool portion and/or second carrier moves to move the bladeto apply the cutting force. The blade may move or be moved toward thecutting surface and/or or the cutting surface may move or be movedtoward the blade. The blade may be a sharpened edge of the secondcarrier, second tool portion or both. The blade may be adjacent to aplurality of dimple forming elements of the second tool portion. Aforward portion and/or rearward portion may include one, two, or moresharpened blade edges. The blade may run along part or all of a lengthof the second tool portion, second carrier, or both. The blade may beparallel with the cutting surface, a longitudinal axis, a plurality ofdimple forming elements, or any combination thereof.

The one or more tool portions may include one or more conveyingelements. The one or more conveying elements may be adapted for moving asheet (i.e., a metal sheet) or allowing for movement of a sheet in afeeding direction. The one or more conveying elements may be automatedor manual. The one or more conveying elements may be located on thefirst tool portion, the second tool portion, or both. The one or moreconveying elements may be located in one or more side rails. The one ormore conveying elements may be incrementally spaced apart along a lengthof the one or more side rails. The one or more conveying elementsinclude one or more rolling elements, such as one or more individualball transfer units (i.e., drop-in, flange mount, recessed, stud mount,and/or the like), a ball transfer table, ball transfer rail, one or moregravity rollers, one or more automated rollers, a roller conveyor, thelike, or any combination thereof. The one or more rolling elements maybe aligned with other rolling elements in one or more axes.

The metal processing apparatus may include one or more control devices.The control devices may coordinate the movement of one or more toolportions, one or more carriers, an indexer, an actuator, one or morepluralities of dimple forming elements, a cutting surface, a blade, oneor more conveying elements, and/or sheet metal. The one or more controldevices may coordinate the indexer, such as the actuator, with thecutting surface and/or the blade. The indexer may be operated in acoordinated manner with one or more tool portions, one or more carriers,a cutting surface, and/or a blade, such that the indexer is able toincrementally advance and/or linearly move one or more pluralities ofdimple forming elements to a pre-determined location (i.e., firstpre-determined location, second pre-determined location, etc), such asafter the blade and cutting surface form a cut edge in sheet metal. Thecoordinated manner may include a computer control, camming arrangement,gear arrangement, the like, or any combination thereof. A computercontrol may be programmed (and include software in a non-transitorystorage medium) such that it is configured to cause activation and/ormovement of an indexer, one or more carriers, an actuator, a dimplesupport member, a cutting surface, a blade, a camming arrangement, agear arrangement, or any combination thereof. The control device mayinclude driving of the actuator. Driving of the actuator may be suchthat it is in synced with movement of one or more tool portions. Forinstance, one or more tool portions may move toward another toolportion(s) for cutting of sheet metal to provide a cut edge. Uponmovement of the tool portions and/or cutting the cut edge, the actuatormay advance a plurality of dimple forming elements. The actuator mayadvance a plurality of dimple forming elements from one pre-determinedlocation to a subsequent pre-determined location. Advancement of theplurality of dimple forming elements may be by way of a cam drivenrelationship. In the cam driven relationship, rotations or revolutionsof a cam may provide for activation of the actuator. Upon activation,the actuator may then drive the dimple support member, a carrier (i.e.,first carrier), or both. By driving the dimple support member and/orcarrier, the plurality of dimple forming elements move from onepre-determined location to a subsequent pre-determined location.

The metal processing apparatus may include one or more side edgedimplers. The side edge dimplers may function to create one or moredimples along one or more side edges of a metal sheet. The side edgedimplers may cooperate with the dimple forming elements so that a metalsheet has a plurality of dimples at least at one cut edge and at leastat one side edge. The side edge dimplers may have any shape or size tocreate one or more dimples along one or more side edges of a metalsheet. The side edges may be adjacent to and/or perpendicular to the cutedges of the metal sheet. The side edges may the edges along apre-determined width of the metal sheet. The side edges may be the edgesnot cut by a blade of the metal processing apparatus. The side edgedimplers may form a plurality of dimples along one or more side edges ofa metal sheet as the metal sheet moves through the metal processingapparatus in the feeding direction. The side edge dimplers may have aplurality of protrusions, indentations, or both. The side edge dimplersmay be located in the first tool portion, second tool portion, or both.The side edge dimplers may be in the form of a rotary wheel withindenting protrusions.

The metal processing apparatus may be useful for forming a plurality ofdimples in a metal sheet. The metal sheet may be useful intransportation body panels, such as those in automobiles, aircrafts,and/or watercrafts. The metal sheet may initially be provided into themetal processing apparatus as a metal blank or a metal coil. The metalprocessing apparatus may include or be in communication with a coilfeeder. The coil feeder may retain a metal coil while allowing the metalto be uncoiled and fed into a portion of the metal processing apparatus.The metal sheet may be comprised of metal or a metal composite. Themetal sheet may be comprised of steel, aluminum, copper, the like, orany combination thereof.

The disclosure relates to a method of using the metal processingapparatus of the teachings herein for dimpling a cut edge portion of ametal sheet. The method includes the following steps: feeding a firstmetal sheet in a feeding direction; cutting a forward portion of thefirst metal sheet to define a front cut edge in the first metal sheet;forming a first plurality of dimples located in a first pre-determinedlocation substantially along the front cut edge of the first metalsheet; advancing the first metal sheet in the feeding direction; cuttinga rearward portion of the first metal sheet to define a rear cut edge inthe first metal sheet and define a perimeter of the first metal sheet;forming a second plurality of dimples in a second pre-determinedlocation substantially along the rear cut edge of the first metal sheet;feeding a second metal sheet in the feeding direction; cutting a forwardportion of the second metal sheet to define a front cut edge in thesecond metal sheet; forming a first plurality of dimples located in athird pre-determined location substantially along the front cut edge ofthe second metal sheet; advancing the second metal sheet in the feedingdirection; cutting a rearward portion of the second metal sheet todefine a rear cut edge in the second metal sheet and define a perimeterof the second metal sheet; forming a second plurality of dimples in afourth pre-determined location substantially along the rear cut edge ofthe second metal sheet; and forming a stack of metal sheets includingthe first metal sheet and the second metal sheet. An air gap is locatedbetween the first metal sheet and the second metal sheet substantiallyabout the perimeter of the first metal sheet and the second metal sheet.The first pre-determined location is off-set relative to the thirdpre-determined location and wherein the second pre-determined locationis off-set relative to the fourth pre-determined location.

The method includes feeding at least one metal sheet in a feedingdirection. The at least one metal sheet may include one or more metalblanks, metal provided by a metal coil, or the like. The at least onemetal sheet may include at least one first metal sheet and second metalsheet. The step of feeding at least one metal sheet into the apparatuscan be repeated once, twice, ten times, one hundred times, or evenindefinitely. The metal may be fed into the apparatus at an incoming endof the apparatus. The incoming end may be at or near the rearwardportion of the first tool portion, the second portion, or both. Thefeeding direction may be generally perpendicular to the longitudinalaxis of the apparatus, may extend from the incoming end to the outgoingend, may extend from a rearward portion to a forward portion, or anycombination thereof. The feeding direction may be at any angle relativeto the cutting surface, blade, or both. The feeding direction may be atany angle from about parallel to about perpendicular relative to thecutting surface, blade, or both. The feeding direction may be at about90° or less, about 75° or less, or about 60° or less from a longitudinalaxis, cutting surface, blade, resulting cut edge, or any combinationthereof. The feeding direction may be at about 5° or more, about 10° ormore, or about 15° or more from a longitudinal axis, cutting surface,blade, resulting cut edge, or any combination thereof. The feedingdirection may run generally perpendicular relative to the cuttingsurface, blade, or both. One or more conveying elements may enable themetal sheet to be moved in the feeding direction. Feeding the metalsheet may also include advancing the metal sheet in the feedingdirection. The metal sheet may be fed into the metal processingapparatus towards the cutting surface, blade, or both.

The method includes cutting a metal sheet to define at least one cutedge of the metal sheet. The method may include cutting a front portion,a rear portion, or both of a metal sheet which may define a front cutedge, a rear cut edge, or both of the metal sheet. The method mayinclude cutting a front portion and/or a rear portion of a first metalsheet to define a front cut edge and/or a rear cut edge of the firstmetal sheet. The method may include cutting a front portion and/or arear portion of a second metal sheet to define a front cut edge and/or arear cut edge in a second metal sheet. By defining the front cut edgeand the rear cut edge, a perimeter of the metal sheet may be defined.The cut edge may be linear, arcuate, or both. Cutting may include movinga blade, a cutting surface, one or more tool portions, one or morecarriers, or any combination thereof such that the blade and cuttingsurface apply a cut force on a metal sheet. Cutting a front portion anda rear portion may be completed separately or simultaneously. Cutting afirst metal sheet and a second metal sheet may be completed separatelyor simultaneously. For example, cutting the rear portion of a firstmetal sheet with a blade may result in simultaneously cutting the frontportion of a second metal sheet with the same blade, such that the rearcut edge of the first metal sheet is defined and separated from thefront cut edge of the second metal sheet. Before, during, or aftercutting the one or more metal sheets, one or more pluralities of dimplesmay be formed in the one or more metal sheets.

The method includes forming one or more pluralities of dimples in one ormore metal sheets. The method may include forming a first plurality ofdimples, a second plurality of dimples, or both in a first metal sheet,a second metal sheet, or both. The method may include forming one ormore pluralities of dimples substantially along one or more cut edges ofone or more metal sheets. The method may include forming a firstplurality of dimples substantially along a front cut edge of a firstmetal sheet, a second metal sheet, or both. The method may includeforming a second plurality of dimples substantially along a rear cutedge of a first metal sheet, a second metal sheet, or both. To form theone or more pluralities of dimples, one or more pluralities of dimpleforming elements may be located and/or moved to one or morepre-determined locations. For example, a first plurality of dimpleforming elements located in a first carrier may be moved from a firstpre-determined location to a subsequent pre-determined location. Thepluralities of dimple forming elements may be moved to pre-determinedlocations which are off-set from one another, such that a precedingpre-determined location is off-set from a subsequent off-set location.By moving the pluralities of dimple forming elements, the pluralities ofdimples formed in the one or more metal sheets are off-set from oneanother as opposed to being aligned. To form the one or more pluralitiesof dimples, one or more pluralities of dimple forming elements may movetoward another plurality of dimple forming elements with sheet metaltherebetween. To move a plurality of dimple forming elements a secondtool portion may move toward a first tool portion, a second carrier maymove toward a first carrier, a second plurality of dimple formingelements may move toward a first plurality of dimple forming elements,or any combination thereof. For instance, a second tool portion and/or asecond carrier having a plurality of wells may move toward a first toolportion and/or a first carrier. The plurality of wells may receive aplurality of dimplers with the sheet metal therebetween. The second toolportion and/or the second carrier pressing against the first toolportion and/or first carrier may result in a die or punch force. The dieor punch force may then result in the sheet metal deforming so that aplurality of dimples are formed along a cut edge of the sheet metallocated between the plurality of wells and plurality of dimplers. Theone or more pluralities of dimples may include a first plurality ofdimples located substantially along a front cut-edge being off-set froma second plurality of dimples located substantially along a rearcut-edge; a first plurality of dimples located substantially along afront cut edge of a first metal sheet being off-set from a firstplurality of dimples located along a front cut edge of a second metalsheet; or both. The one or more pluralities of dimples may include asecond plurality of dimples located substantially along a rear cut-edgebeing off-set from a first plurality of dimples located substantiallyalong a front cut-edge; a second plurality of dimples locatedsubstantially along a rear cut edge of a first metal sheet being off-setfrom a second plurality of dimples located along a rear cut edge of asecond metal sheet; or both. Forming of the plurality of dimples may beat ambient temperatures. Forming of the plurality of dimples may be inthe absence of a heat source.

The method includes forming a stack of metal sheets. The method mayinclude forming a stack with at least a first metal sheet and a secondmetal sheet. Stacking may be automated or manual. When the metal sheetsare placed into the stack, an air gap is located between the metalsheets. The air gap may be about 0.1 mm or more, about 0.5 mm or more,about 1 mm or more. The air gap may be about 50 mm or less, about 45 mmor less, or about 30 mm or less. The air gap may be locatedsubstantially about at least a portion of the perimeters of the metalsheets. The air gap may not be present along the entirety of theperimeters of the metal sheets. The air gap may be located substantiallyalong at least the front cut edge, rear cut edge, or both. The air gapmay be a result of one or more pluralities of dimples formed in one ormore metal sheets. The pluralities of dimples of one sheet may contact(e.g., direct contact) a non-dimpled surface of an opposing stackedsheet, thus creating an air gap between the individual dimples, along atleast a portion of the perimeters, or both. The plurality of dimplesformed in one sheet (i.e., first metal sheet) may be off-set from aplurality of dimples formed in another sheet (i.e., second metal sheet).By off-setting the dimples, at least some dimples of one sheet areprevented from nesting when stacked with at least some dimples ofanother sheet. By preventing nesting, the air gap between the metalsheets is maintained.

Illustrative Embodiments

The following descriptions of the Figures are provided to illustrate theteachings herein, but are not intended to limit the scope thereof.

FIGS. 1 and 2 illustrate a metal processing apparatus 10. FIG. 1 showsthe metal processing apparatus 10 in an open position 11. FIG. 2 showsthe metal processing apparatus in a closed position 13. The metalprocessing apparatus 10 includes a first tool portion 12 in an opposingrelationship to a second tool portion 34. The second tool portion 34 islocated above and in opposing relationship to the first tool portion 12.The first tool portion 12 includes a first carrier 14. The second toolportion 34 includes a second carrier 36. In the open position 11, thesecond tool portion 34 is distanced from the first tool portion 12. Inthe open position 11, the first carrier 14 is distanced from andopposing the second carrier 36. The open position 11 allows for a metalsheet 76 (not shown) to move through the space between the first carrier14 and the second carrier 36. In the closed position 13, the second toolportion 34 is moved toward the first tool portion 12. In the closedposition, the second carrier 36 is moved toward and cooperates with thefirst carrier 14. The closed position 13 allows the second carrier 36 tocontact the first carrier 14 so that a blade (not shown) of the secondcarrier 36 cuts an edge (not shown) in a metal sheet 76 (not shown). Theclosed position 13 allows the first carrier 14 and the second carrier 36to cooperate together to form a plurality of dimples in a metal sheet 76(not shown).

FIG. 3 illustrates a first tool portion 12 of a metal processingapparatus 10. The first tool portion 12 includes a first carrier 14. Thefirst tool portion 12 includes a forward portion 16 and a rearwardportion 18. The first tool portion 12 includes a cutting surface 20. Thecutting surface 20 may be part of the first carrier 14. The cuttingsurface 20 may be located between the forward portion 16 and therearward portion 18 of the first tool portion 12. The cutting surface 20may be adapted to be in contact with a blade (not shown). The cuttingsurface 20 may be vertically offset (i.e., stepped down, grooved,indented) from an upper surface 21 of the forward portion 16 and/or therearward portion 18. The first tool portion 12 includes a firstplurality of dimple forming elements 22. Some of the first plurality ofdimple forming elements 22, 22 a may be located on the forward portion16. The first plurality of dimple forming elements in the forwardportion 22 a are evenly spaced out along the length of the forwardportion 16. Some of the first plurality of dimple forming elements 22,22 b may be located on the rearward portion 18. The first plurality ofdimple forming elements in the rearward portion 22 b are evenly spacedout along the length of the rearward portion 18. Although FIG. 3 showsthe first plurality of dimple forming elements 22 evenly spaced alongthe lengths of the forward portion 16 and the rearward portion 18, itmay be understood the first plurality of dimple forming elements 22 maybe spaced unevenly or staggered along the lengths of the first portion16 and/or the rearward portion 18. The first plurality of dimple formingelements in the rearward portion 22 b may be located directly across oropposing the first plurality of dimple forming elements in the forwardportion 22 a. The first tool portion 12 may include one or moreconveying elements 24. The first tool portion 12 may include one or moreside rails 26. The one or more side rails 26 may be located on eitherside of the first carrier 14. The one or more side rails 26 may includea front rail 28, located in the forward portion 16. The one or more siderails 26 may include a rear rail 30, located in the rearward portion 18.The one or more conveying elements 24 may be part of the one or moreside rails 26. The one or more conveying elements 24 may include one ormore rolling elements 32. The rolling elements 32 may include one ormore rollers (i.e., roller ball transfer, ball transfer conveyor strip).The first tool portion 12 may include one or more mating elements 44.The one or more mating elements 44 may be configured to mate with asecond tool portion 34 (not shown). The one or more mating elements 44may be configured to mate with one or more mating elements 46 (notshown) of the second tool portion 34 (not shown). The one or more matingelements 44 may be configured to mate with a second tool portion 34 (notshown) so that the first tool portion 12 is in opposing relation to thesecond tool portion 34 (not shown).

FIG. 4 illustrates a second tool portion 34 of a metal processingapparatus 10. The second tool portion 34 is adapted to be in opposingrelation to the first tool portion 12 (not shown). The second toolportion 34 includes a second carrier 36. The second tool portion 34includes a forward portion 38 and a rearward portion 40. The second toolportion 34 may be configured to receive a blade 39 or include a blade39. The blade 39 may be between the forward portion 38 and rearwardportion 40. The blade is shown as a blade edge 39 of the forward portion38. The forward portion 38 may be configured such that both edges areblade edges 39 a, 39 b. A first blade edge 39 may be adjacent to therearward portion 40. The forward portion 38 may be able to be reversed(i.e., rotated 180°) when a first blade edge 39 a becomes dull, so thata second blade edge 39 b may be adjacent to the rearward portion 40. Theblade 39 may be adapted to contact the cutting surface 20 (not shown) ofthe first tool portion 12 (not shown) to form a cut edge (not shown) ina metal sheet (not shown). The second tool portion 34 includes a secondplurality of dimple forming elements 42. Some of the second plurality ofdimple forming elements 42 a may be located on the forward portion 38.The forward portion 38 may include two sets of the second plurality ofdimple forming elements 42 a. Some of the second plurality of dimpleforming elements 43 a may be closer to the first blade edge 39 a. Someof the second plurality of dimple forming elements 43 b may be closer tothe second blade edge 39 b. By having two sets of the second pluralityof dimple forming elements 42 a, the blade is able to be rotated 180°.It may be understood that a single set of the second plurality of dimpleforming elements 42 a in the forward portion 38 may also be used. Someof the second plurality of dimple forming elements 42 b may be locatedon the rearward portion 40. The second plurality of dimple formingelements 42 may be aligned with the first plurality of dimple formingelements 22 (not shown) when the first tool portion 12 is mated with thesecond tool portion 34. The second plurality of dimple forming elements42 may be adapted to cooperate with the first plurality of dimpleforming elements 22 to form a plurality of dimples 83 (not shown) near acut edge 82, 88 (not shown) of a metal sheet 76 (not shown). The secondtool portion 34 may include one or more mating elements 46. The one ormore mating elements 46 may be configured to mate with the first toolportion 12 (not shown). The one or more mating elements 46 may beconfigured to mate with such as one or more mating elements 44 (notshown) of the first tool portion 12 (not shown). The one or more matingelements 46 may be configured to mate with a first tool portion 12 (notshown) so that the second tool portion 34 is in opposing relation to thefirst tool portion 12 (not shown). The one or more mating elements 44,46 of the first tool portion 12 and second tool portion 34 may cooperatetogether as stop blocks to prevent further motion of the second toolportion 34 toward the first tool portion 12, or vice versa.

FIG. 5 illustrates the first plurality of dimple forming elements 22 inthe first carrier 14. The first plurality of dimple forming elements 22may be a plurality of male dimple forming elements. The first pluralityof dimple forming elements may be located in the first carrier 14. Thefirst plurality of dimple forming elements 22 may include two or morefirst dimple forming elements 22 a on the forward portion 16. The firstplurality of dimple forming elements 22 may include two or more firstdimple forming elements 22 b on the rearward portion 18. The two or morefirst dimple forming elements 22 a on the forward portion 16 may bealigned with one another along a single axis 56. The two or more firstforming elements 22 b on the rearward portion 18 may be aligned with oneanother along a single axis 58. The first dimple forming elements 22 onthe forward portion 16 may be aligned with (i.e., generally opposing,across from) the first dimple forming elements 22 on the rearwardportion 18.

FIG. 6 illustrates the second plurality of dimple forming elements 42 inthe second carrier 36. The second plurality of dimple forming elements42 may be a plurality of female dimple forming elements. Two or moresecond dimple forming elements 42 a may be located on the forwardportion 38 of the second tool portion 34. Two or more second dimpleforming elements 42 b may be located on the rearward portion 40 of thesecond tool portion 34. The two or more second dimple forming elements42 a on the forward portion 38 may be aligned with one another along asingle axis 60. The two or more dimple forming elements 42 b on therearward portion 40 may be aligned with one another along a single axis62. The second dimple forming elements 42 a on the forward portion 38may be aligned or offset from the second dimple forming elements 42 b onthe rearward portion 40.

FIG. 7 illustrates the first plurality of dimple forming elements 22 inthe first carrier 14. The first plurality of dimple forming elements 22are illustrated as a plurality of male dimple forming elements. Thefirst plurality of dimple forming elements 22 includes a plurality ofbores 50. The plurality of bores 50 are configured to receive aplurality of dimplers 48. For example, an individual bore 50 may receivean individual dimpler 48. The plurality of bores 50 are formed as aplurality of bores 50 in the first carrier 14. The plurality of dimplers48 include one or more protrusions 51. Each protrusion 51 extends from abase 52. The one or more protrusions 51 may be one or more generallyupright posts. The one or more protrusions 51 may have a generallycone-like shape which tapers from the base 52. The one or moreprotrusions 51 have generally tapered ends 54. The base 52 of eachindividual dimpler 48 is sized such to fit within an individual well 50(i.e. smaller diameter than a diameter of the well).

FIG. 8 illustrates the second plurality of dimple forming elements 42 inthe second carrier 36. The second plurality of dimple forming elements42 may be a plurality of female dimple forming elements. The secondplurality of dimple forming elements 42 may include a plurality of wells55. The second plurality of dimple forming elements 42 may be generallyslot-shaped (i.e., narrow, elongated). Each individual second dimpleforming element 42 may have a length longer than the diameter of eachindividual first dimple forming element 22 (e.g. diameter greater thandiameter of protrusion 51 (not shown)). Two or more second dimpleforming elements 42 a may be located on the forward portion 38 of thesecond tool portion 34. Two or more second dimple forming elements 42 bmay be located on the rearward portion 40 of the second tool portion 34.

FIG. 9 illustrates the dimpler indexer 64 which is part of the metalprocessing apparatus 10. The dimpler indexer 64 may be affixed to thefirst tool portion 12. The dimpler indexer 64 is in communication withthe first plurality of dimple forming elements 22. The dimpler indexer64 is configured for moving the first plurality of dimple formingelements 22 from at least one first pre-determined location (not shown)to at least one second pre-determined location (not shown). The dimplerindexer 64 may be able to move the first plurality of dimple formingelements 22 along an axis DA. Axis DA may be substantially parallel tothe longitudinal axis L_(A) (as shown in FIG. 3). The dimpler indexer 64includes an actuator 66 and a dimpler support member 68. The dimplersupport member 68 is adjacent to (i.e., below) and/or affixed to thefirst carrier 14. The dimpler support member 68 carries or is incommunication with the first plurality of dimple forming elements 22.The dimpler support member 68 may be able to incrementally advance ormove the first plurality of dimple forming elements 22 (i.e., from afirst pre-determined position to a second pre-determined position). Theactuator 66 includes an air-cylinder 70, a flow-control manifold 72, andone or more air distribution lines 73. The actuator 66 may include or beconnected to an air source (not shown) which provides compressed air tothe actuator 66.

FIGS. 10 and 11 illustrate movement of the first carrier 14 of the metalprocessing apparatus 10 from a first position 98 to a second position100. FIG. 10 shows the first carrier 14 and the first plurality ofdimple forming elements 22 in a first position 98. In the first position98, the first plurality of dimple forming elements 22 are received inand justified toward one end of the slot-shaped second plurality ofdimple forming elements 42. The dimpler indexer 64 (not shown) moves thefirst plurality of dimple forming elements 22 along axis DA to thesecond position 100. FIG. 11 shows the first plurality of dimple formingelements 22 in the second position 100. In the second position 100, thefirst plurality of dimple forming elements 22 are received in andjustified toward another end of the slot shaped second plurality ofdimple forming elements 42. Simultaneously during movement of the firstcarrier 14 from the first position 98 to the second position 100, thesecond carrier 36 may be moved away from the first carrier 14 (i.e.,upwardly) and then moved toward the first carrier 14.

FIG. 12 illustrates a metal processing apparatus 10 receiving a metalsheet 76. A metal sheet 76 is fed into the metal processing apparatus10, in a feeding direction 78. The feeding direction 78 is at an angle,such as perpendicular, to the longitudinal axis L_(A), the cuttingsurface 20, cutting blade 39 (not shown), or a combination thereof. Ablade 39 (not shown) from the second tool portion 34 (not shown) comesinto contact with the cutting surface 20 of the first tool portion 12 tocut a front portion 80 of the metal sheet 76. The front portion 80 wherecut is defined as a front cut edge 82 of the metal sheet 76. The firstplurality of dimple forming elements 22 may be located at a firstpre-determined location (not shown) by the dimpler indexer 64 (notshown). The first pre-determined location may be substantially along thefront cut edge 82 of the metal sheet 76. The second plurality of dimpleforming elements 42 may then move toward the first plurality of dimpleforming elements 22. The first and second plurality of dimple formingelements 22, 42 (not shown) may apply a force onto the metal sheet 76substantially along the front cut edge 82 such as to form a firstplurality of dimples (not shown) substantially along the front cut edge82. The metal sheet 76 may then be advanced in the feeding direction 78for a pre-determined distance.

FIG. 13 illustrates a metal processing apparatus 10 finalizingprocessing on a metal sheet 76. A metal sheet 76, is advanced in themetal processing apparatus 10, in the feeding direction 78. The blade 39(not shown) from the second tool portion 34 (not shown) comes intocontact with the cutting surface 20 of the first tool portion 12 to cuta rear portion 86 of the metal sheet 76. The rear portion 86 where cutis defined as a rear cut edge 88 of the metal sheet 76. The firstplurality of dimple forming elements 22 may be located at a secondpre-determined location (not shown) by the dimpler indexer 64 (notshown). The second pre-determined location (not shown) may be the sameor may be off-set relative to the first pre-determined location (notshown). The second pre-determined location may be substantially alongthe rear cut edge 88 of the metal sheet 76. The second plurality ofdimple forming elements 42 (not shown) may then move toward the firstplurality of dimple forming elements 22. The first and second pluralityof dimple forming elements 22, 42 (not shown) may apply a force onto themetal sheet 76 substantially along the rear cut edge 88 such as to forma second plurality of dimples (not shown) substantially along the rearcut edge 88. The metal sheet 76 may then be removed from the metalprocessing apparatus 10.

FIGS. 14a and 14b illustrate a stack of metal sheets 92. Each of themetal sheets 76 includes a plurality of dimples 83. The plurality ofdimples may be formed by a metal processing apparatus 10 (not shown)having a plurality of dimple forming elements 22, 42 (not shown). Theplurality of dimples 83 may include a first plurality of dimples 84 anda second plurality of dimples 90. A first plurality of dimples 84 may belocated along a front cut edge 82 of the metal sheet 76. A secondplurality of dimples 90 may be located along a rear cut edge 88 of themetal sheet 76. The stack 92 comprises at least one first metal sheet 75and at least one second metal sheet 77 stacked upon one another. An airgap 94 is located between the first metal sheet 75 and the second metalsheet 77. The air gap 94 is located substantially at the perimeters 96of the first and second metal sheets 75, 77. The plurality of dimples 83in the first metal sheet 75 are offset from the plurality of dimples 83in the second metal sheet 76 to provide the air gap 94 by preventing themetal sheets 76 from nesting with one another.

REFERENCE NUMERAL LISTING

-   -   10 Metal processing apparatus    -   11 Open position    -   12 First tool portion    -   13 Closed position    -   14 First carrier    -   16 Forward portion of first tool portion    -   18 Rearward portion of first tool portion    -   20 Cutting surface    -   21 Upper surface of first carrier    -   22 First plurality of dimple forming elements    -   22 a First plurality of dimple forming elements in forward        portion    -   22 b First plurality of dimple forming elements in rearward        portion    -   24 One or more conveying elements    -   26 One or more side rails    -   28 Front rail    -   30 Rear rail    -   32 One or more rolling elements    -   34 Second tool portion    -   36 Second carrier    -   38 Forward portion of second tool portion    -   39 Blade edge    -   39 a First blade edge    -   39 b Second blade edge    -   40 Rearward portion of second tool portion    -   42 Second plurality of dimple forming elements    -   42 a Second plurality of dimple forming elements in forward        portion    -   42 b Second plurality of dimple forming elements in rearward        portion    -   43 a Second plurality of dimple forming elements at first blade        edge    -   43 b Second plurality of dimple forming elements at second blade        edge    -   44 One or more mating elements of first tool portion    -   46 One or more mating elements of second tool portion    -   48 Plurality of dimplers in first tool portion    -   50 Plurality of bores in first tool portion    -   51 One or more protrusions of dimpler    -   52 Base of dimpler    -   54 Tapered end of dimpler    -   55 Plurality of wells    -   56 Forward axis of first plurality of dimple forming elements    -   58 Rearward axis of first plurality of dimple forming elements    -   60 Forward axis of second plurality of dimple forming elements    -   62 Rearward axis of second plurality of dimple forming elements    -   64 Dimpler indexer    -   66 Actuator of dimpler indexer    -   68 Dimpler support member of dimpler indexer    -   70 Air cylinder of dimpler indexer    -   72 Flow-control manifold of dimpler indexer    -   73 Air distribution lines    -   75 First metal sheet    -   76 Metal sheet    -   77 Second metal sheet    -   78 Feeding direction    -   80 Front portion of metal sheet    -   82 Front cut edge of metal sheet    -   83 Plurality of dimples    -   84 First plurality of dimples    -   86 Rear portion of metal sheet    -   88 Rear cut edge of metal sheet    -   90 Second plurality of dimples    -   92 Stack of metal sheets    -   94 Air gap between metal sheets    -   96 Perimeter of metal sheet    -   98 First position    -   100 Second position    -   L_(A) Longitudinal axis    -   DA Axis

Unless otherwise stated, any numerical values recited herein include allvalues from the lower value to the upper value in increments of one unitprovided that there is a separation of at least 2 units between anylower value and any higher value. As an example, if it is stated thatthe amount of a component, a property, or a value of a process variablesuch as, for example, temperature, pressure, time and the like is, forexample, from 1 to 90, preferably from 20 to 80, more preferably from 30to 70, it is intended that intermediate range values such as (forexample, 15 to 85, 22 to 68, 43 to 51, 30 to 32 etc.) are within theteachings of this specification. Likewise, individual intermediatevalues are also within the present teachings. For values which are lessthan one, one unit is considered to be 0.0001, 0.001, 0.01 or 0.1 asappropriate. These are only examples of what is specifically intendedand all possible combinations of numerical values between the lowestvalue and the highest value enumerated are to be considered to beexpressly stated in this application in a similar manner.

Unless otherwise stated, all ranges include both endpoints and allnumbers between the endpoints. The use of “about” or “approximately” inconnection with a range applies to both ends of the range. Thus, “about20 to 30” is intended to cover “about 20 to about 30”, inclusive of atleast the specified endpoints.

The disclosures of all articles and references, including patentapplications and publications, are incorporated by reference for allpurposes. The term “consisting essentially of” to describe a combinationshall include the elements, ingredients, components or steps identified,and such other elements ingredients, components or steps that do notmaterially affect the basic and novel characteristics of thecombination. The use of the terms “comprising” or “including” todescribe combinations of elements, ingredients, components or stepsherein also contemplates embodiments that consist essentially of, oreven consist of the elements, ingredients, components or steps. Pluralelements, ingredients, components or steps can be provided by a singleintegrated element, ingredient, component or step. Alternatively, asingle integrated element, ingredient, component or step might bedivided into separate plural elements, ingredients, components or steps.The disclosure of “a” or “one” to describe an element, ingredient,component or step is not intended to foreclose additional elements,ingredients, components or steps.

It is understood that the above description is intended to beillustrative and not restrictive. Many embodiments as well as manyapplications besides the examples provided will be apparent to those ofskill in the art upon reading the above description. The scope of theinvention should, therefore, be determined not with reference to theabove description, but should instead be determined with reference tothe appended claims, along with the full scope of equivalents to whichsuch claims are entitled. The disclosures of all articles andreferences, including patent applications and publications, areincorporated by reference for all purposes. The omission in thefollowing claims of any aspect of subject matter that is disclosedherein is not a disclaimer of such subject matter, nor should it beregarded that the inventors did not consider such subject matter to bepart of the disclosed inventive subject matter.

The invention claimed is:
 1. A method for dimpling a cut edge portion ofa plurality of metal sheets comprising: (i) feeding a first metal sheetin a feeding direction; (ii) cutting a forward portion of the firstmetal sheet to define a front cut edge in the first metal sheet; (iii)forming a first plurality of dimples located in a first pre-determinedlocation substantially along the front cut edge of the first metalsheet; (iv) advancing the first metal sheet in the feeding direction;(v) cutting a rearward portion of the first metal sheet to define a rearcut edge in the first metal sheet and define a perimeter of the firstmetal sheet; (vi) forming a second plurality of dimples in a secondpre-determined location substantially along the rear cut edge of thefirst metal sheet; (vii) feeding a second metal sheet in the feedingdirection; (viii) cutting a forward portion of the second metal sheet todefine a front cut edge in the second metal sheet; (ix) forming a firstplurality of dimples located in a third pre-determined locationsubstantially along the front cut edge of the second metal sheet; (x)advancing the second metal sheet in the feeding direction; (xi) cuttinga rearward portion of the second metal sheet to define a rear cut edgein the second metal sheet and define a perimeter of the second metalsheet; (xii) forming a second plurality of dimples in a fourthpre-determined location substantially along the rear cut edge of thesecond metal sheet; (xiii) forming a stack of metal sheets including thefirst metal sheet and the second metal sheet, wherein an air gap islocated between the first metal sheet and the second metal sheetsubstantially about the perimeter of the first metal sheet and thesecond metal sheet, wherein the air gap is greater than about 0.1 mm;and wherein the first pre-determined location is off-set relative to thethird pre-determined location and wherein the second pre-determinedlocation is off-set relative to the fourth pre-determined location. 2.The method of claim 1, wherein the steps of cutting the rearward portionof the first metal sheet and cutting the forward portion of the secondmetal sheet are simultaneous.
 3. The method of claim 2, wherein thesteps of cutting the rearward portion of the first metal sheet andcutting the forward portion of the second metal sheet are performed by asame blade.
 4. The method of claim 1, wherein advancing the first metalsheet in the feeding direction is so that the front cut edge of thefirst metal sheet is at an angle relative to the feeding direction. 5.The method of claim 4, wherein the step of feeding the first metal sheetincludes depositing the first metal sheet onto a conveyor having aplurality of rolling elements.
 6. The method of claim 1, wherein thesteps of feeding the first metal sheet and the second metal sheetinclude feeding the first metal sheet and the second metal sheet into anincoming end of a metal processing apparatus.
 7. The method of claim 6,wherein the metal processing apparatus includes a blade and alongitudinal axis and wherein the blade is parallel to the longitudinalaxis, wherein the feeding direction is generally perpendicular to thelongitudinal axis and the blade; and wherein the blade simultaneouslycuts the rearward portion of the first metal sheet and the forwardportion of the second metal sheet.
 8. The method of claim 6, wherein themetal processing apparatus includes a blade or is configured to receivethe blade; and wherein the steps of cutting include moving the bladetoward a cutting surface and/or moving the cutting surface toward theblade.
 9. The method of claim 6, wherein the metal processing apparatusincludes a first plurality of dimple forming elements aligned with asecond plurality of dimple forming elements; wherein the steps offorming the first plurality of dimples and the second plurality ofdimples of the first metal sheet include moving the first plurality ofdimple forming elements toward the second plurality of dimple formingelements and/or the second plurality of dimple forming elements towardthe first plurality of dimple forming elements with the first metalsheet therebetween; and wherein the steps of forming the first pluralityof dimples and the second plurality of dimples of the second metal sheetinclude moving the first plurality of dimple forming elements toward thesecond plurality of dimple forming elements and/or the second pluralityof dimple forming elements toward the first plurality of dimple formingelements with the second metal sheet therebetween.
 10. The method ofclaim 9, wherein a plurality of dimplers are part of the first pluralityof dimple forming elements and/or the second plurality of dimple formingelements, and a plurality of wells are part of the first plurality ofdimple forming elements and/or the second plurality of dimple formingelements; and wherein during the steps of forming the first plurality ofdimples and the second plurality of dimples of the first metal sheet andthe second metal sheet, the plurality of wells receive the plurality ofdimplers.
 11. The method of claim 9, wherein after forming the firstplurality of dimples of the first metal sheet in the firstpre-determined location and/or the second plurality of dimples of thefirst metal sheet in the second pre-determined location, the firstplurality of dimple forming elements and/or the second plurality ofdimple forming elements move to an off-set pre-determined location toform the first plurality of dimples of the second metal sheet in thethird pre-determined location and/or the second plurality of dimples ofthe second metal sheet in the fourth pre-determined location.
 12. Themethod of claim 1, wherein the step of forming the stack of metal sheetsincludes preventing nesting of at least some of the first plurality ofdimples and/or the second plurality of dimples of the first metal sheetand the second metal sheet to maintain the air gap.
 13. A method fordimpling a cut edge portion of a plurality of metal sheets comprising:(i) feeding a first metal sheet in a feeding direction into an incomingend of a metal processing apparatus; (ii) cutting a forward portion ofthe first metal sheet with a blade of the metal processing apparatus todefine a front cut edge in the first metal sheet; (iii) forming a firstplurality of dimples located in a first pre-determined locationsubstantially along the front cut edge of the first metal sheet; (iv)advancing the first metal sheet in the feeding direction in the metalprocessing apparatus; (v) cutting a rearward portion of the first metalsheet with the blade to define a rear cut edge in the first metal sheetand define a perimeter of the first metal sheet; (vi) forming a secondplurality of dimples in a second pre-determined location substantiallyalong the rear cut edge of the first metal sheet; (vii) feeding a secondmetal sheet in the feeding direction into the incoming end of the metalprocessing apparatus; (viii) cutting a forward portion of the secondmetal sheet with the blade to define a front cut edge in the secondmetal sheet; (ix) forming a first plurality of dimples located in athird pre-determined location substantially along the front cut edge ofthe second metal sheet; (x) advancing the second metal sheet in thefeeding direction in the metal processing apparatus; (xi) cutting arearward portion of the second metal sheet with the blade to define arear cut edge in the second metal sheet and define a perimeter of thesecond metal sheet; (xii) forming a second plurality of dimples in afourth pre-determined location substantially along the rear cut edge ofthe second metal sheet; (xiii) forming a stack of metal sheets includingthe first metal sheet and the second metal sheet, wherein an air gap islocated between the first metal sheet and the second metal sheetsubstantially about the perimeter of the first metal sheet and thesecond metal sheet, wherein the air gap is greater than about 0.1 mm;and wherein the first pre-determined location is off-set relative to thethird pre-determined location and wherein the second pre-determinedlocation is off-set relative to the fourth pre-determined location. 14.The method of claim 13, wherein the steps of cutting the rearwardportion of the first metal sheet and cutting the forward portion of thesecond metal sheet are simultaneous.
 15. The method of claim 13, whereinadvancing the first metal sheet in the feeding direction is so that thefront cut edge of the first metal sheet is at an angle relative to thefeeding direction.
 16. The method of claim 13, wherein the metalprocessing apparatus includes a first plurality of dimple formingelements aligned with a second plurality of dimple forming elements;wherein the steps of forming the first plurality of dimples and thesecond plurality of dimples of the first metal sheet include moving thefirst plurality of dimple forming elements toward the second pluralityof dimple forming elements and/or the second plurality of dimple formingelements toward the first plurality of dimple forming elements with thefirst metal sheet therebetween; and wherein the steps of forming thefirst plurality of dimples and the second plurality of dimples of thesecond metal sheet include moving the first plurality of dimple formingelements toward the second plurality of dimple forming elements and/orthe second plurality of dimple forming elements toward the firstplurality of dimple forming elements with the second metal sheettherebetween.
 17. The method of claim 16, wherein a plurality ofdimplers are part of the first plurality of dimple forming elementsand/or the second plurality of dimple forming elements, and a pluralityof wells are part of the first plurality of dimple forming elementsand/or the second plurality of dimple forming elements; and whereinduring the steps of forming the first plurality of dimples and thesecond plurality of dimples of the first metal sheet and the secondmetal sheet, the plurality of wells receive the plurality of dimplers.18. The method of claim 16, wherein after forming the first plurality ofdimples of the first metal sheet in the first pre-determined locationand/or the second plurality of dimples of the first metal sheet in thesecond pre-determined location, the first plurality of dimple formingelements and/or the second plurality of dimple forming elements move toan off-set pre-determined location to form the first plurality ofdimples of the second metal sheet in the third pre-determined locationand/or the second plurality of dimples of the second metal sheet in thefourth pre-determined location.